Standard Horizon HX280E Service Manual Download Page 40 | Manualshive

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HX280S/E Main Unit (Side “B”)
Parts Layout

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Summary of Contents for HX280E

Page 1: ...1 SERVICE MANUAL VHF FM Marine Transceiver HX280S E EM038N90A HX280S HX280E ...

Page 2: ...Microphone Impedance 2 kΩ Receiver Circuit Type Double Conversion Superheterodyne Intermediate Frequencies 1st 21 7 MHz 2nd 450 kHz Adjacent Channel Selectivity 70 dB typical Intermodulation 68 dB typical Hum Noise Ratio 40 dB typical Sensitivity 0 25 μV for 12 dB SINAD Selectivity 25 kHz 70 dB AF Output Internal SP 700 mW 16 Ω for 10 THD 7 4 V Performance specifications are nominal unless otherwi...

Page 3: ...itter RF Power Output 5 W 1 W 7 4 V Modulation Type Variable Reactance Maximum Deviation 5 kHz Spurious Emission Less than 0 25 μW Microphone Impedance 2 kΩ Receiver Circuit Type Double Conversion Superheterodyne Intermediate Frequencies 1st 21 7 MHz 2nd 450 kHz Adjacent Channel Selectivity 70 dB Intermodulation 68 dB Hum Noise Ratio 40 dB Sensitivity 1 μV for 20 dB SINAD Selectivity 25 kHz 70 dB ...

Page 4: ... e e e e RA1089600 REFLECTOR SHEET CS2020101 TERMINAL ASSY RA1089600 RUBBER PACKING TERMINAL RA1089500 SPONGE RUBBER WINDOW RA1078700 KNOB VOL RA1079500 RUBBER PACKING VOL RA1079400 RING NUT VOL RA1078500 CASE COVER REAR RA091970 O RING 6x2 2 REF c d e VXSTD P N U02310020 U24106020 U9900068 DESCRIPTION SEMS SCREW SM3X10SUS BIND HEAD TAPTITE B M2X6SUS PAN HEAD TAPTITE B M2X4NI 3 QTY 1 2 13 DESCRIPT...

Page 5: ...5 Block Diagram ...

Page 6: ...6 Note ...

Page 7: ...he audio mute switch Q1034 SN74LVC1G66DCKR the audio volume VR1004 and the audio power amplifier Q1032 TDA2822 pin 7 providing up to 700 mW of audio power to the 16 ohm loudspeaker 3 Squelch Control The squelch circuitry consists of a noise amplifier and band pass filter and noise detector within Q1026 BA4116FV When no carrier received noise at the out put of the detector stage in Q1026 BA4116FV i...

Page 8: ...erence divider sections of Q1021 LV2105V divides the 21 25 MHz crystal reference from the reference oscillator section ofQ1021 LV2105V by 850 to produce the 25 0 kHz loops reference The 25 0 kHz signal from the programmable divider de rived from the VCO and that derived from the reference oscillator are applied to the phase detector section of Q1021 LV2105V which produces a pulsed output with puls...

Page 9: ...rough famil iarity with its correct use is necessary for complete re alignment Correction of problems caused by misalign ment resulting from use of improper test equipment is not covered under the warranty policy While most steps do not require all of the equipment listed the interactions of some adjustments may require that more complex ad justments be performed afterwards Do not attempt to perfo...

Page 10: ...erence Frequency Adjustment Turn the Antenna switch to the TX Alignment side Remove the solder jumper JP1001 Set the channel to CH16 Use the H L key to set the transceiver to LOW power With the PTT switch pressed adjust TC1001 so the Frequency Counter reading is 156 800 MHz 100 Hz Transmit Power Adjustment Turn the Antenna switch to the TX Alignment side Set the channel to CH16 Increase the DC Pow...

Page 11: ...L AL Press the SCAN key Then the LCD will be shown the Alignment Item 1st Item is Threshold tH tH tH tH tH Set the RF Signal Generator output to 156 800 MHz at a level of 8 dBμ HX280S or 6 dBμ HX280E 3 0 kHz deviation with a 1 kHz audio tone Press the PRESET key to record a threshold level Press the MEM key to save the new setting Press the SCAN key to recall the Alignment Item tI tI tI tI tI TIGH...

Page 12: ...12 Note ...

Page 13: ...V TX 2 83 V RX 0 V TX 1 13 V RX 0 V TX 1 41 V RX 0 V TX 2 21 V 3 11 V RX SIGNAL Non 1 15 V RX SIGNAL 40 dBμ 0 02 V RX 1 82 V TX 0 V RX 1 75 V TX 0 V 7 40 V RX 7 35 V TX 0 40 V RX 6 62 V TX 7 12 V RX 2 77 V TX 0 V RX 2 75 V TX 1 84 V RX 1 41 V TX 1 41 V RX 3 29 V TX 0 V 3 30 V 1 78 V RX 1 69 V TX 3 37 V 4 12 V 1 93 V 2 28 V RX 0 V TX 4 78 V RX 4 90 V TX 0 V RX 0 V TX 3 29 V RX 3 29 V TX 0 V 3 44 V ...

Page 14: ...14 MAIN Unit Note ...

Page 15: ...15 MAIN Unit Parts Layout Side A B A D C F E G 1 3 2 4 H DTC143ZE E23 Q1035 μPD78F0484GK Q1025 VMZ6 8NT2L 6C D1024 LM2904PWR Q1004 DTC144EE 26 Q1020 1036 ...

Page 16: ...Q1013 DTC144EE 26 Q1006 1029 1030 BA4116FV Q1026 LV2105V Q1021 DA221 K D1019 DAN235E D1017 RB715F 3D D1002 FMMTL618TA L68 Q1012 BR24L08FVT Q1027 b a d c f e g 1 3 2 4 h UMD5N Q1010 1011 LM2902PWR Q1005 NJM12902V Q1003 RQA0011DNS Q1009 SN74LVC1G66 Q1034 TAR5S33U Q1002 TAR5S50U Q1001 3SK294 UV Q1022 3SK318 YB Q1022 TDA2822D013TR Q1032 DTC143ZE E23 Q1023 IMN10 N10 D1020 ...

Page 17: ...41 CHIP CAP 27pF 50V CH GRM1552C1H270JZ01D K22178222 1 B c3 C 1043 CHIP CAP 0 001uF 50V B GRM155B11H102KA01D K22178809 1 B f3 C 1044 CHIP CAP 0 001uF 50V B GRM155B11H102KA01D K22178809 1 B f3 C 1045 CHIP CAP 22pF 50V CH UMK105CH220JV F K22178266 1 B g3 C 1046 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 B a3 C 1047 CHIP CAP 0 01uF 25V B GRM155B11E103KA01D K22148834 1 B f3 C 1048 CHIP CAP 33...

Page 18: ...CAP 0 01uF 25V B GRM155B11E103KA01D K22148834 1 B e2 C 1120 CHIP CAP 0 001uF 50V B GRM155B11H102KA01D K22178809 1 B f2 C 1121 CHIP CAP 15pF 25V CH TMK105CH150J F K22148218 1 B d3 C 1122 CHIP CAP 0 001uF 50V B GRM155B11H102KA01D K22178809 1 B e2 C 1123 CHIP CAP 0 001uF 50V B GRM155B11H102KA01D K22178809 1 B d3 C 1124 CHIP CAP 0 001uF 50V B GRM155B11H102KA01D K22178809 1 B f2 C 1125 CHIP CAP 22pF 50...

Page 19: ... h1 C 1196 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 B a1 C 1197 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 B a2 C 1198 CHIP TA CAP 10uF 16V TEESVA1C106M8R K78120077 1 B h2 C 1199 CHIP CAP 0 01uF 25V B GRM155B11E103KA01D K22148834 1 B h2 C 1200 CHIP CAP 0 01uF 25V B GRM155B11E103KA01D K22148834 1 B a2 C 1201 CHIP CAP 270pF 50V B UMK105B271KW F K22178822 1 B b2 C 1202 CHIP CAP 0 ...

Page 20: ...B 56NG RF L1691041 1 B g2 L 1017 M RFC 0 18uH 2 C1608CB R18G RF L1691102 HX280E 1 B g2 L 1017 M RFC 0 22uH 2 C1608CB R22G RF L1691103 HX280S 1 B g2 L 1018 M RFC 0 1uH HK1608 R10J T L1690528 1 B g2 L 1019 M RFC 0 068uH HK1608 68NJ T L1690526 1 B e3 L 1021 M RFC 0 039uH 2 C1608CB 39NG RF L1691039 1 B g2 L 1022 M RFC 0 039uH 2 C1608CB 39NG RF L1691039 1 B f2 L 1023 M RFC 0 082uH HK1608 82NJ T L169052...

Page 21: ...RES 180 1 16W 5 RMC1 16S 181JTH J24189016 1 B b2 R 1029 CHIP RES 15k 1 16W 5 RMC1 16S 153JTH J24189039 1 B c3 R 1030 CHIP RES 1k 1 16W 5 RMC1 16S 102JTH J24189025 1 B a2 R 1031 CHIP RES 180 1 16W 5 RMC1 16S 181JTH J24189016 1 B a2 R 1032 CHIP RES 68k 1 16W 5 RMC1 16S 683JTH J24189047 1 B a2 R 1033 CHIP RES 4 7k 1 16W 5 RMC1 16S 472JTH J24189033 1 B e3 R 1034 CHIP RES 47k 1 16W 5 RMC1 16S 473JTH J2...

Page 22: ...HIP RES 10k 1 16W 0 5 MCR01MZPD1002 J24189374 1 A E2 R 1107 CHIP RES 4 7k 1 16W 0 5 MCR01MZPD4701 J24189370 1 A E2 R 1108 CHIP RES 8 2k 1 16W 5 RMC1 16S 822JTH J24189036 1 B b3 R 1109 CHIP RES 0 1 16W 5 RMC1 16S JPTH J24189070 HX280E 1 A E2 R 1110 CHIP RES 100 1 16W 5 RMC1 16S 101JTH J24189013 1 B b1 R 1111 CHIP RES 1k 1 16W 5 RMC1 16S 102JTH J24189025 1 B c2 R 1112 CHIP RES 1k 1 16W 5 RMC1 16S 10...

Page 23: ...W 5 RMC1 16S 220JTH J24189005 1 A A1 R 1185 CHIP RES 4 7 1 16W 5 RMC1 16S 4R7JTH J24189066 1 B h2 R 1186 CHIP RES 100k 1 16W 5 RMC1 16S 104JTH J24189049 1 A A2 R 1187 CHIP RES 10k 1 16W 5 RMC1 16S 103JTH J24189037 1 A C2 R 1188 CHIP RES 100k 1 16W 5 RMC1 16S 104JTH J24189049 1 B f2 R 1189 CHIP RES 100k 1 16W 5 RMC1 16S 104JTH J24189049 1 B f2 R 1194 CHIP RES 330 1 16W 5 RMC1 16S 331JTH J24189019 1...

Page 24: ...24 Note MAIN Unit ...

Page 25: ...E CHARGER UNIT Ú When removing the Charger Unit from the Case gently pull on the charger unit while pushing the three charging terminals from the outside of the case Circuit Diagram RA1092900 x 2 pcs SHEET HEAT10t2 Ref VXSTD P N U23108020 Description BIND HEAD TAPTITE P 2X8SUS Qty 4 ...

Page 26: ...26 CD 46 Charger Cradle Parts Layout 2SA1774 FR Q3006 NJM12903R Q3001 DTC124EU 25 Q3008 DTC144EE 26 Q3003 3004 3005 Side A Side B 2SB1201S Q3007 BAJ2CC0FP Q3002 ...

Page 27: ...3006 TRANSISTOR 2SA1774 TL R G3117748R 1 Q 3007 TRANSISTOR 2SB1201S TL G3070195 1 Q 3008 TRANSISTOR DTC124EU T106 G3070045 1 R 3001 CHIP RES 3 3k 1 16W 5 RMC1 16 332JATP J24185332 1 R 3003 CHIP RES 3 9k 1 16W 1 RMC1 16 392FTP J24183392 1 R 3004 CHIP RES 100k 1 16W 5 RMC1 16 104JATP J24185104 1 R 3005 CHIP RES 39k 1 16W 1 RMC1 16 393FTP J24183393 1 R 3006 CHIP RES 39k 1 16W 1 RMC1 16 393FTP J241833...

Page 28: ...28 Note ...

Page 29: ...HX280S E Main Unit Circuit Diagram 1 2 3 5 6 7 4 8 ...

Page 30: ...HX280S E Main Unit Circuit Diagram 1 2 3 5 6 7 4 8 ...

Page 31: ...HX280S E Main Unit Circuit Diagram 1 2 3 5 6 7 4 8 ...

Page 32: ...HX280S E Main Unit Circuit Diagram 1 2 3 5 6 7 4 8 ...

Page 33: ...HX280S E Main Unit Circuit Diagram 1 2 3 5 6 7 4 8 ...

Page 34: ...HX280S E Main Unit Circuit Diagram 1 2 3 5 6 7 4 8 ...

Page 35: ...HX280S E Main Unit Circuit Diagram 1 2 3 5 6 7 4 8 ...

Page 36: ...HX280S E Main Unit Circuit Diagram 1 2 3 5 6 7 4 8 ...

Page 37: ...HX280S E Main Unit Side A Parts Layout 1 2 ...

Page 38: ...HX280S E Main Unit Side A Parts Layout 1 2 ...

Page 39: ...HX280S E Main Unit Side B Parts Layout 1 2 ...

Page 40: ...HX280S E Main Unit Side B Parts Layout 1 2 ...

Page 41: ...29 Note ...

Page 42: ...NDARD CO LTD All rights reserved No portion of this manual may be reproduced without the permission of VERTEX STANDARD CO LTD Marine Division of VERTEX STANDARD US Headquarters 10900 Walker Street Cypress CA 90630 U S A ...

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